x3-1因式分解X3-1如何因式分解
问题描述:
x3-1因式分解
X3-1如何因式分解
答
X3-1
=(x-1)(x^2+x+1)
答
原式=(X-1)(X平方+X+1)
答
X^3-1
=X(X^2-1)+(X-1)
=X(X+1)(X-1)+(X-1)
=(X-1)(X^2+X+1)